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Requires Turing. NVENC 1650 has Pascal NVENC, so 1660+. Thanks to Diversion on the forum for the assistance.
81 lines
4.9 KiB
Markdown
81 lines
4.9 KiB
Markdown
---
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Type: article
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Title: Nvidia Nvenc
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Project: HandBrake
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Project_URL: https://handbrake.fr/
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Project_Version: Latest
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Language: English
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Language_Code: en
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Authors: [ Bradley Sepos <bradley@bradleysepos.com> (BradleyS), Scott (s55) ]
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Copyright: 2020 HandBrake Team
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License: Creative Commons Attribution-ShareAlike 4.0 International
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License_Abbr: CC BY-SA 4.0
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License_URL: https://handbrake.fr/docs/license.html
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---
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Nvidia Nvenc
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============
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## Supported Hardware and Configurations
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- Nvidia GeForce GTX Pascal (1050+) and RTX Turing (1650+, 2060+) series GPU or better
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- Nvidia Graphics Driver 418.81 or later
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- Windows 10
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- Experimental Linux support is available in HandBrake’s command line interface
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Please note, these are not hard limits. Hardware encoding via Nvenc *might* work on older series GPUs and older operating systems, but this is not officially supported.
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## Enabling support
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Support for the Nvidia Nvenc encoder is enabled in preferences on the video tab. If your system is not supported, the option will be disabled.
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## Performance
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Only video encoding is performed by the hardware encoder. Every stage prior to and after video encoding including decoding, filters, audio/video sync, audio encoding, muxing, etc., is performed by the CPU. As a result, it is normal to have high (even 100%) CPU utilisation during encodes.
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It is common, particularly on lower-end hardware, for the CPU to be a bottleneck for the hardware video encoder. To minimize this effect, disable any filters that you do not require.
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## Advanced options
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The Nvidia Nvenc hardware encoder has a limited set of advanced encoder options. Generally speaking, it is not recommended to change these parameters, as the built-in presets offer a good range of options for common uses.
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From HandBrake’s command line interface, use the `--encopts` parameter as follows:
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--encopts="option1=value1:option2=value2"
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From HandBrake’s graphical interface, set the options in the `Advanced Options` field on the `Video` tab:
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option1=value1:option2=value2
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### Option value types
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The following value types are supported (each option only accepts one value type):
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- integer
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A number that can be written without a fractional or decimal component.
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- boolean
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0 means off (or disabled).
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1 means on (or enabled).
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- string
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An alphanumeric string of characters. See the option’s comments for acceptable values.
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### Options list
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| Option | Type | H.264 | H.265 | Detail |
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|------------------|-------------|:-----:|:-----:|-----------------------------------------------------------------------------------------------------------|
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| gpu | string | ✓ | ✓ | GPU selection. Values: `any` (default), `0` (first GPU), `1` (second GPU), etc. |
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| coder | string | ✓ | | Coder selection. Values: `auto` (default), `cabac`, `cavlc`. |
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| temporal-aq | boolean | ✓ | | Set to `1` to enable Temporal Adaptive Quality, `0` to disable (default). Note the hyphen for H.264. |
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| temporal_aq | boolean | | ✓ | Set to `1` to enable Temporal Adaptive Quality, `0` to disable (default). Note the underscore for H.265. *Requires RTX Turing 1660 or better.* |
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| spatial-aq | boolean | ✓ | | Set to `1` to enable Spatial Adaptive Quality, `0` to disable (default). Note the hyphen for H.264. |
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| spatial_aq | boolean | | ✓ | Set to `1` to enable Spatial Adaptive Quality, `0` to disable (default). Note the underscore for H.265. |
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| aq-strength | int | ✓ | ✓ | When Spatial AQ is enabled, the values scale is `1` (low) – `15` (aggressive). Default: `8`. |
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| nonref_p | boolean | ✓ | ✓ | Set to `1` to enable automatic insertion of non-reference P-frames, `0` to disable (default). |
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| strict_gop | boolean | ✓ | ✓ | Set to `1` to minimize GOP-to-GOP rate fluctuations, `0` to disable (default). |
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| weighted_pred | boolean | ✓ | ✓ | Set to `1` to enable weighted prediction, `0` to disable (default). |
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| rc-lookahead | int | ✓ | ✓ | Number of frames to look ahead for rate control. Default: `0`. |
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| b_adapt | boolean | ✓ | | When lookahead is enabled, set this to `1` to enable adaptive B-frame decision (default), `0` to disable. |
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| no-scenecut | boolean | ✓ | ✓ | When lookahead is enabled, set this to `1` to enable adaptive I-frame insertion at scene cuts (default), `0` to disable. |
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